Air-supplying means for closed-top gas-stove burners



June 17,1930. GERCICH ET AL 1,764,718

AIR SUPPLYING MEANS FOR CLOSED T0; GAS STOVE BURNERS Filed Aug. 28, 1924 INVENTOR fTAGfKC/C/i w.s. 5mm. I

216M ATTORNEY Patented June 17, 1930 UNITED j STATES PATENT; OFFICE FREDERICK A. GERCICH AND WILLIAM S. SMITH, 0F OAKLAND, CALIFORNIA, AS- SIGNORS IO HAMMER-EBAY COMPANY, OF OAKLAND, CALIFORNIA, A CORPORA- IION OF CALIFORNIA AIR-SUPPLYING MEANS FOR CLOSED-TOP GAS-STOVE BURNERS Applicationfiled August 28, 1924. Serial No. 734,631.

are supplied with front and rear sets of top gas burners. Where agrate has been superposed over the burners to provide a cooking top, no difficulty has been experienced in the matter of the adequate supply of air for the different burners. However, when the burners are superposed by a closed or solid top, it has frequently been found that the rear burners receive less air for combustion than do the front burners, since the burner compartment is usually open only at the front and is desirably shallow. In accordance with the latter difliculty, it is an object of our invention to provide means for insuring an adequate supply of fresh air to the burners and thus insure proper combustion of the fuel.

Another object of the invention is to provide means for supplying air to the rear burners which will not require the use'of a deformed or undersized drip pan under the burners. V

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred formof our invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that we do not limit ourselves to the showing made by the said drawings and descriptlon, as we may adopt variations of the preferred form within the scope of our invention as set forth in the claims.

Referring to said drawings:

Figure 1 is a vertical sectional view of a fragment of a gas stove showing a rear top burner equipped with the device of our 1n vention.

Figure 2 is a plan view of the burner and device shown in Figure 1.

Figure 3 is a plan viewof'the cooking top.

As illustrated in the drawings, thedevlce of our invention is embodied in a stove 4 provided with a closed or solid gas cooking-top 6. The latter comprises a top gas-burner compartment 7 whose sides are defined by side walls 8 and 9 and a rear wall 12. The

bottom of the compartment is preferably defined by a plate 13, while the top is olosedby a cooking'plate 14, here shown provided with openings 16 normally closed by means of lids 17. The compartment 7 is desirably shallow so that a maximum space may be available below the compartment for other uses. Arranged in the compartment 7 are front and rear gas burners 18 and 19 respectively, here shown supported by means of cross rods 21 and aligned with the lid openings 16. The

proper gas mixture for the burners is ar- 5 ranged to be supplied thereto through pipes 22 connected to the gas manifold 23 at the front of the stove. Air for completing combustion is arranged to enter the compartment through the opening 24 at the. front thereof, and the products of combustion are arranged to discharge through a vent 26 located at the rearof the compartment and with at least a portion thereof in a higher plane than is the top of the open ing24, It will thus be noted that a draft is set up from 1 the front to the rear of the compartment. Since the indrawn air crosses the front burners first, the major portion of the oxygen therein is taken therefrom to complete the combustion process at these burners, theresult that the air which reaches the rear burners seldom provides suflicient oxygen for such burners.

with

Primarily in consequence of the foregoing,

means are provided for insuring an adequate supply of oxygen to the rear burners. In the present embodiment of the invention, such supply is arranged to be taken directly from a source extraneous to the burner compartment. Arranged within the compartment and, as here shown, spaced from the bottom plate is a conduit 27 through which air from behind the stove is adapted to be drawn and guided to the flame of a rear burner, one of ment, while the outlet end 81 of the conduit 10g is enlarged and is adapted for the reception of the burner, clearance between'the burner and walls of the conduit end 31 being provided so that the air may readily circulate around all portions of the burner to thus provide desired-distribution of the air. The top edge 32 of the conduit is preferably above the top of the burner, .so that the products of combustion travelling from the front burners to the 'vent will not interfere with the supplying of air to the flame from the conduit. desired, the portion of the conduit surrounding the burner may be shaped to approximately conform to the. arrangement of the burner jets and thus promote the more uniform distribution of air to them. To still furtherenhance the desired air flow, the conduit is so designed that its effective area of discharge exceeds the area of the intake. In this manner, expansion of the air, due to the heating thereof as it passes through the conduit, will not create back pressure and thereby -retard-the flow of air to the burners.

Each-conduit is here shown arranged to be supported in the compartment by the cross rod 21. In the present embodiment of the invention the'con'duit is formed in upper and lower separable sections 33*and 34 respectively. The lower section is preferably provided -with hook port-ions 36 by means of "which it maybe removably hung on the rod 21, While a flange 37 is provided adjacent the intake 'endb'y which it may be releasably held supported in the wall. The upper section 33 of theconduit is here shown arranged to be supported by the lower section 34 thereof, the forming'of the-conduit in separable sections being designed 'to allow the removal and replacement of theconduits and burners without necessitating removal of the cross rod 21.

It will be noted that with the conduits to .with its upper and lower ends, open and disposed above and below the burner,.,'said member having a notch therein through which said pipe extends to the -burner, and a conduit leading from the back of the stove to the lower end of said member and supplying atmospheric air thereto, said conduit being independent of and spaced between said top and plate.

In'testimon'ywhereof, we have hereunto set our' hands at Oakland, California.

FREDERICK A. GE-RC-ICH. WILLIAM S. SMITH.

formed and applied as shown, the, bottom of Y the burner compartment is not effected by the operation of the device, with the result that the drippan 3'8 whichis usually placed under the burners, need not be of special construc tion; If desired, a drip opening 39 may be provided in the/bottom of the conduit to allow drainage.

1. In combination with the burner chamber of the cooking top of-a closed-top gas stove, aburner mounted in said chamber, a supporting member for said burner, air supplying means for said burner comprising a conduit formed in vertically'separable sections and arranged to supply air to said burner from a source external to said chamber, the lower section of said conduit being arranged to be supported by the burner supporting member, and the upper section of said conduit being arran ed to be supported by said lower conz: duitsection.

2. The combination with a stove having a cooking 'top and a plate spaced below said 

